package net.minecraft.command;

import java.util.Collections;
import java.util.List;
import javax.annotation.Nullable;

import net.minecraft.block.state.IBlockState;
import net.minecraft.nbt.JsonToNBT;
import net.minecraft.nbt.NBTException;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.server.MinecraftServer;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;

public class CommandBlockData extends CommandBase {
    public String getName() {
        return "blockdata";
    }

    public int getRequiredPermissionLevel() {
        return 2;
    }

    public String getUsage(ICommandSender sender) {
        return "commands.blockdata.usage";
    }

    public void execute(MinecraftServer server, ICommandSender sender, String[] args) throws CommandException {
        if (args.length < 4) {
            throw new WrongUsageException("commands.blockdata.usage", new Object[0]);
        } else {
            sender.setCommandStat(CommandResultStats.Type.AFFECTED_BLOCKS, 0);
            BlockPos blockpos = parseBlockPos(sender, args, 0, false);
            World world = sender.getEntityWorld();

            if (!world.isBlockLoaded(blockpos)) {
                throw new CommandException("commands.blockdata.outOfWorld", new Object[0]);
            } else {
                IBlockState iblockstate = world.getBlockState(blockpos);
                TileEntity tileentity = world.getTileEntity(blockpos);

                if (tileentity == null) {
                    throw new CommandException("commands.blockdata.notValid", new Object[0]);
                } else {
                    NBTTagCompound nbttagcompound = tileentity.writeToNBT(new NBTTagCompound());
                    NBTTagCompound nbttagcompound1 = nbttagcompound.copy();
                    NBTTagCompound nbttagcompound2;

                    try {
                        nbttagcompound2 = JsonToNBT.getTagFromJson(buildString(args, 3));
                    } catch (NBTException nbtexception) {
                        throw new CommandException("commands.blockdata.tagError", new Object[]{nbtexception.getMessage()});
                    }

                    nbttagcompound.merge(nbttagcompound2);
                    nbttagcompound.setInteger("x", blockpos.getX());
                    nbttagcompound.setInteger("y", blockpos.getY());
                    nbttagcompound.setInteger("z", blockpos.getZ());

                    if (nbttagcompound.equals(nbttagcompound1)) {
                        throw new CommandException("commands.blockdata.failed", new Object[]{nbttagcompound.toString()});
                    } else {
                        tileentity.readFromNBT(nbttagcompound);
                        tileentity.markDirty();
                        world.notifyBlockUpdate(blockpos, iblockstate, iblockstate, 3);
                        sender.setCommandStat(CommandResultStats.Type.AFFECTED_BLOCKS, 1);
                        notifyCommandListener(sender, this, "commands.blockdata.success", new Object[]{nbttagcompound.toString()});
                    }
                }
            }
        }
    }

    public List<String> getTabCompletions(MinecraftServer server, ICommandSender sender, String[] args, @Nullable BlockPos targetPos) {
        return args.length > 0 && args.length <= 3 ? getTabCompletionCoordinate(args, 0, targetPos) : Collections.emptyList();
    }
}